<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>CSS Transitions Test: transitionend event with negative delay</title>
        <meta name="assert" content="Test checks that transitionend event is triggered for duration time being canceled out by negative delay">
        <link rel="help" title="2.4. The 'transition-delay' Property" href="http://www.w3.org/TR/css3-transitions/#transition-delay-property">
        <link rel="help" title="5. Transition Events" href="http://www.w3.org/TR/css3-transitions/#transition-events">
        <link rel="author" title="Rodney Rehm" href="http://rodneyrehm.de/en/">
        <meta name="flags" content="dom">
        
        <script src="/resources/testharness.js" type="text/javascript"></script>
        <script src="/resources/testharnessreport.js" type="text/javascript"></script>
        
        <script src="./support/vendorPrefix.js" type="text/javascript"></script>
        <script src="./support/helper.js" type="text/javascript"></script>
        <script src="./support/runParallelAsyncHarness.js" type="text/javascript"></script>
        <script src="./support/generalParallelTest.js" type="text/javascript"></script>
        <script src="./support/properties.js" type="text/javascript"></script>

        <style type="text/css">
            #offscreen {
                position: absolute;
                top: -100000px;
                left: -100000px;
                width: 100000px;
                height: 100000px;
            }
        </style>
        
        <script id="metadata_cache">/*
        {
          "duration: 0.1s, delay: -0.05s / events": {},
          "duration: 0.1s, delay: -0.1s / events": {}
        }
        */</script>
    </head>
    <body>
        <!-- required by testharnessreport.js -->
        <div id="log"></div>
        <!-- elements used for testing -->
        <div id="fixture" class="fixture">
            <div class="container">
                <div class="transition">Text sample</div>
            </div>
        </div>
        <div id="offscreen"></div>
        
        <!--
            SEE ./support/README.md for an abstract explanation of the test procedure
            http://test.csswg.org/source/contributors/rodneyrehm/submitted/css3-transitions/README.md
        -->

        <script>
            // If the value for 'transition-delay' is a negative time offset then the transition will execute the moment the property 
            // is changed, but will appear to have begun execution at the specified offset. That is, the transition will appear to 
            // begin part-way through its play cycle. In the case where a transition has implied starting values and a negative 
            // 'transition-delay', the starting values are taken from the moment the property is changed.

            // http://www.w3.org/TR/css3-transitions/#starting
            // Define the combined duration of the transition as the sum of max(‘transition-duration’, ‘0s’) and ‘transition-delay’. 
            // When the combined duration is greater than ‘0s’, then a transition starts based on the values of ‘transition-duration’, 
            // ‘transition-delay’, and ‘transition-timing-function’; in other cases transitions do not occur.
        
            // this test takes its time, give it a minute to run
            var timeout = 60000;
            setup({timeout: timeout});
            
            var tests = [
                {
                    name: "duration: 0.1s, delay: -0.05s",
                    transitions: 'all .1s linear -0.05s',
                    from: {'padding-left': '1px'},
                    to: {'padding-left': '10px'},
                    expect: [
                        'padding-left:0.1s' 
                    ]
                }, {
                    name: "duration: 0.1s, delay: -0.1s",
                    transitions: 'all .1s linear -0.1s',
                    from: {'padding-left': '1px'},
                    to: {'padding-left': '10px'},
                    expect: [
                        'padding-left:0.1s' 
                    ]
                }
            ]; 
            
            // general transition-duration
            var duration = '0.5s';

            runParallelAsyncHarness({
                // array of test data
                tests: tests,
                // the number of tests to run in parallel
                testsPerSlice: 50,
                // milliseconds to wait before calling teardown and ending test
                duration: parseFloat(duration) * 1000,
                // the global suite timeout
                timeout: timeout,
                // prepare individual test
                setup: function(data, options) {
                    var styles = {
                        '.fixture': {},

                        '.container': {},
                        '.container.to': {},
                        '.container.how': {},
                        
                        '.transition': data.from,
                        '.transition.to' : data.to,
                        '.transition.how' : {transition: data.transitions}
                    };

                    generalParallelTest.setup(data, options);
                    generalParallelTest.addStyles(data, options, styles);
                },
                // cleanup after individual test
                teardown: generalParallelTest.teardown,
                // invoked prior to running a slice of tests
                sliceStart: generalParallelTest.sliceStart,
                // invoked after running a slice of tests
                sliceDone: generalParallelTest.sliceDone,
                // test cases, make them as granular as possible
                cases: {
                    // test TransitionEnd events
                    'events': {
                        start: function(test, data, options) {
                            // kick off the transition
                            generalParallelTest.startTransition(data);
                        },
                        done: function(test, data, options) {
                            // make sure we got the event for the tested property only
                            test.step(generalParallelTest.assertExpectedEventsFunc(data, 'transition', data.expect));
                        }
                    }
                },
                // called once all tests are done
                done: generalParallelTest.done
            });
        </script>
    </body>
</html>